Many physicists are still skeptical that dark energy can fully explain gravity, and are therefore exploring alternative theories.
Galaxy clusters help confirm the Standard Model of Cosmology
Comparing simulated X-ray emissions from galaxy clusters to real observations provides support for the Standard Model of Cosmology.
How accurate are our models of rotating neutron stars?
Comparing algorithms used to model spinning neutron stars, scientists hope to better understand the physics of the elementary particles that make them up.
New type of black hole merger may have just been observed
Merging pairs of black holes are thought to have originated from binary stars, but new observations indicate this might not always be true.
General relativity may need tweaking on the grand scale of the Universe
Conflict between theory and observational evidence suggests a missing ingredient in our understanding of the early Universe.
A quark star may have just been discovered
More confirmation needed to see if recently discovered object is a quark star.
James Webb Telescope images the Pillars of Creation
This month, NASA’s James Webb Telescope captured images of the Pillars of Creation in breathtaking detail.
Upper mass limit of massive stars revisited
Physicists at the Gemini Observatory have found a new mass limit for massive stars, and found it to be lower than previously thought.
Is the Universe running out of stars?
Astronomers are discovering that the rate of star formation in the universe is dropping, and they want to know why.
Steven Hawley: “I’ve always enjoyed the progress we made”
Astrophysicist and retired NASA astronaut Steven Hawley takes us through his fascinating career.